Batgirl shows her how its done.

"Bitch please." Says Babs as she walks up the bars and pushes Harley to the floor by her head. She spins you around to face her, then drops to her knees. She turns back to Harley who fell on her bare ass on the cold cell floor and says, "Take notes." Before putting your dick in her mouth. She bobs and twists her head like a pro while playing with your balls. Then she takes the full length of you dick in her throat. She holds it there as she looks up at you and winks.

"Hey no fair! I wasn't done." Harley shouts. Batgirl ignores her as she keeps bobbing and twisting and doing things with her tongue you've never felt before. Then she pulls your dick out of her mouth and starts licking and sucking your balls as she strokes your dick against her mask.